[resolved] [Plugin: W3 Total Cache] wpmu compatibility (14 posts)

Unzip and upload the plugin to your plugins directory (wp-content/plugins/) when done wp-content/plugins/w3-total-cache/ should exist. If you have WordPress MU you will need to install this in wp-content/mu-plugins/w3-total-cache/.

wpmu does not look into subfolders, so placing the whole folder into mu-plugins doesn't work.

Also, you have to be careful with installing this. It creates a db.php file, and if you are using the Multi-DB plugin, the db.php in wp-content which is needed for multi-db to function will get over written.

I installed W3 Total Cache to my WordPress MU installation based on the suggestion above.

When I activate the plugin sitewide, all of my blogs give me an error like the following:

W3 Total Cache Error: Unable to read config file or it is broken. Please create D:\Apache2.2\htdocs/wp-content/w3-total-cache-config-bond.aurorak12.org.php from D:\Apache2.2\htdocs/wp-content/plugins/w3-total-cache/w3-total-cache-config-default.php.

This is for one of the blogs on my WPMU, bond.aurorak12.org
I get similar errors for my other blogs.

wpmu does not look into subfolders, so placing the whole folder into mu-plugins doesn't work.

I suggest to put it into the plugins folder and activate sidewide.

@Ovidiu is correct.

W3 Total Cache Error: Unable to read config file or it is broken. Please create D:\Apache2.2\htdocs/wp-content/w3-total-cache-config-bond.aurorak12.org.php from D:\Apache2.2\htdocs/wp-content/plugins/w3-total-cache/w3-total-cache-config-default.php.

@rablegen this issue has been addressed in the release that will be available shortly (today).

Also, you have to be careful with installing this. It creates a db.php file, and if you are using the Multi-DB plugin, the db.php in wp-content which is needed for multi-db to function will get over written.

@fredericktownes - How can we use both W3TC and Multi-DB? I just installed the plugin, and it over-wrote my /wp-content/db.php file, which is required for Multi-DB to work.

Only one db.php file can exist at once, so there is an immediate impasse there that requires W3TC to otherwise handle logic used in Multi-DB. Support for this scenario for v1.1. Something better to be honest, support for Google MMM.